For a certain reaction.
ΔG^- = -45 kj/mol and ΔH^- = -90 kj/mol at 0°C.
What is the minimum temperature at which the reaction will become spontaneous, assuming that ΔH^- and ΔS^- are independent of temperature?

Combustion of a candle is

A. physical change

B. reduction reaction

C. endothermic reaction

D. exothermic reaction

Which law of the thermochemistry introduces the concept of entropy?

A. Second Law

B. Zeroth Law

C. Third Law

D. First Law

Which of the following is a closed system?

A. Jet engine

B. Tea placed in steel kettle

C. Pressure cooker

D. Rocket engine during propulsion

The entropy of perfectly crystalline solid at absolute zero is

A. positive

B. negative

C. Zero

D. not definite